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diff --git a/dom/events/test/test_bug924087.html b/dom/events/test/test_bug924087.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=924087
+-->
+<head>
+  <title>Test for Bug 924087</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<div contenteditable><a id="editable" href="#">editable link</a></div>
+<a id="noneditable" href="#">non-editable link</a>
+<input>
+<textarea></textarea>
+<pre id="test">
+<script type="application/javascript;version=1.8">
+
+/** Test for Bug 924087 **/
+SimpleTest.waitForExplicitFinish();
+SimpleTest.waitForFocus(function() {
+  var editable = document.querySelector("#editable");
+  var noneditable = document.querySelector("#noneditable");
+  var input = document.querySelector("input");
+  var textarea = document.querySelector("textarea");
+  synthesizeMouseAtCenter(noneditable, {type:"mousedown"});
+  is(document.querySelector(":active:link"), noneditable, "Normal links should become :active");
+  synthesizeMouseAtCenter(noneditable, {type:"mouseup"});
+  synthesizeMouseAtCenter(editable, {type:"mousedown"});
+  is(document.querySelector(":active:link"), null, "Editable links should not become :active");
+  synthesizeMouseAtCenter(editable, {type:"mouseup"});
+  [input, textarea].forEach(textbox => {
+    synthesizeMouseAtCenter(textbox, {type:"mousedown"});
+    is(document.querySelector(textbox.localName + ":active"), textbox, "The textbox should become :active");
+    synthesizeMouseAtCenter(textbox, {type:"mouseup"});
+  });
+  SimpleTest.finish();
+});
+
+</script>
+</pre>
+
+</body>
+</html>